Re: [sr-dev] git:master:d6b1c20d: tm: restore X/AVP values from initial transaction in DNS failover processing

Hi Daniel, Thanks for the feedback. I have done a lot of tests on my setup, but of course it’s a complicated module. The relevant function part is called when the DNS failover is executed, to my understanding like this: 1. INVITE is sent to proxy (auth challenge etc..) 2. proxy is sending to DNS domain 3. DNS domain is resolved to two A records, first IP is chosen 4. proxy sends INVITE to first IP 5. IP does not reply, tm timeout is triggered 6. X/AVP context gets lost, probably due to cleanup from core (this will cleanup internal X/AVP list) 7. add_uac_dns_fallback function is executed, restore X/AVP list from transaction 8. INVITE is sent to second IP 9. Call is established 10. Cleanup is done again to delete internal X/AVP list See below for an example call log with added local debugging before the fix. TM timeout is 5s. First INVITE: Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} <script>: got request INVITE to sip:customer-2@sip01.tst.nbg.domain.net from 116.203.XX.XX:5095 Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} <core> [core/xavp.c:1258]: xavu_get_internal(): name _tps_, list (nil), prv (nil) Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} <core> [core/xavp.c:1258]: xavu_get_internal(): name _tps_, list (nil), prv (nil) Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} <core> [core/xavp.c:1258]: xavu_get_internal(): name b_contact, list 0x7ffd5e5e9570, prv (nil) Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} <script>: set XAVPs Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} <script>: received call customer-2 from customer group 0 (116.203.XX.XX) Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24655]: INFO: {1 14601 ACK Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} <script>: received call customer-2 from customer group 0 (116.203.XX.XX) Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24655]: INFO: {1 14601 ACK Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} <core> [core/xavp.c:1222]: xavu_reset_list(): resetting list Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24655]: INFO: {1 14601 ACK Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} <core> [core/receive.c:628]: receive_msg(): cleaning up Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} tm [t_funcs.c:244]: t_relay_to(): 1 Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} tm [h_table.c:373]: build_cell(): setting list in new context Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} <core> [core/xavp.c:1236]: xavu_set_list(): setting list 0x7fc9a0421c68 Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} tm [t_hooks.c:344]: run_reqin_callbacks_internal(): backup AVPs Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} <core> [core/xavp.c:1236]: xavu_set_list(): setting list 0x7fc9a0421c68 Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} tm [t_hooks.c:360]: run_reqin_callbacks_internal(): restore backup AVPs Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} <core> [core/xavp.c:1236]: xavu_set_list(): setting list 0x7fc9a0421c68 Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} tm [t_funcs.c:289]: t_relay_to(): 2: T 0x7fc9a0421a30, XAVU 0x7fc9a041ebb0 Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} tm [t_funcs.c:342]: t_relay_to(): 3: T 0x7fc9a0421a30, XAVU 0x7fc9a041ebb0 Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} tm [t_fwd.c:1642]: t_forward_nonack(): 1, T: 0x7fc9a0421a30, XAVU 0x7fc9a041ebb0 Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} tm [t_fwd.c:1690]: t_forward_nonack(): 2, T: 0x7fc9a0421a30, XAVU 0x7fc9a041ebb0 Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} tm [t_fwd.c:1776]: t_forward_nonack(): 3, T: 0x7fc9a0421a30, XAVU 0x7fc9a041ebb0 Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} <core> [core/xavp.c:1258]: xavu_get_internal(): name _tps_, list (nil), prv (nil) Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} <core> [core/xavp.c:1559]: xavu_get_child(): ravp 0x7fc9a041ebb0, xavu current list 0x7fc9a0421c68 Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} <core> [core/xavp.c:1562]: xavu_get_child(): ravp 0x7fc9a041ebb0, type 6, xavu current list 0x7fc9a0421c68 Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} <core> [core/xavp.c:1258]: xavu_get_internal(): name a_contact, list 0x7ffd5e5e11f0, prv (nil) Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} <core> [core/xavp.c:1258]: xavu_get_internal(): name _tps_, list (nil), prv (nil) Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} <core> [core/xavp.c:1559]: xavu_get_child(): ravp 0x7fc9a041ebb0, xavu current list 0x7fc9a0421c68 Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} <core> [core/xavp.c:1562]: xavu_get_child(): ravp 0x7fc9a041ebb0, type 6, xavu current list 0x7fc9a0421c68 Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} <core> [core/xavp.c:1258]: xavu_get_internal(): name contact_host, list 0x7ffd5e5e11f0, prv (nil) Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} <core> [core/xavp.c:1258]: xavu_get_internal(): name _tps_, list (nil), prv (nil) Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} <core> [core/xavp.c:1559]: xavu_get_child(): ravp 0x7fc9a041ebb0, xavu current list 0x7fc9a0421c68 Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} <core> [core/xavp.c:1562]: xavu_get_child(): ravp 0x7fc9a041ebb0, type 6, xavu current list 0x7fc9a0421c68 Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} <core> [core/xavp.c:1258]: xavu_get_internal(): name b_contact, list 0x7ffd5e5e11f0, prv (nil) Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} <core> [core/xavp.c:1258]: xavu_get_internal(): name _tps_, list (nil), prv (nil) Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} <core> [core/xavp.c:1559]: xavu_get_child(): ravp 0x7fc9a041ebb0, xavu current list 0x7fc9a0421c68 Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} <core> [core/xavp.c:1562]: xavu_get_child(): ravp 0x7fc9a041ebb0, type 6, xavu current list 0x7fc9a0421c68 Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} <core> [core/xavp.c:1258]: xavu_get_internal(): name contact_host, list 0x7ffd5e5e11f0, prv (nil) Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} <core> [core/xavp.c:1222]: xavu_reset_list(): resetting list Aug 9 09:56:09 kam01 /usr/local/kamailio-devel/sbin/kamailio[24652]: INFO: {1 14602 INVITE Kt5POLYd9pvtxqx1idXSgNqZ4OFkSxOS} <core> [core/receive.c:628]: receive_msg(): cleaning up DNS failover: Aug 9 09:56:11 kam01 /usr/local/kamailio-devel/sbin/kamailio[24672]: INFO: <core> [core/xavp.c:1222]: xavu_reset_list(): resetting list Aug 9 09:56:11 kam01 /usr/local/kamailio-devel/sbin/kamailio[24672]: INFO: <core> [core/receive.c:628]: receive_msg(): cleaning up Aug 9 09:56:14 kam01 /usr/local/kamailio-devel/sbin/kamailio[24665]: INFO: tm [h_table.c:132]: free_cell_helper(): freeing transaction 0x7fc9a041b288 from timer.c:650 Aug 9 09:56:14 kam01 /usr/local/kamailio-devel/sbin/kamailio[24665]: INFO: tm [t_hooks.c:247]: run_trans_callbacks_internal(): backup AVPs Aug 9 09:56:14 kam01 /usr/local/kamailio-devel/sbin/kamailio[24665]: INFO: <core> [core/xavp.c:1236]: xavu_set_list(): setting list 0x7fc9a041b4c0 Aug 9 09:56:14 kam01 /usr/local/kamailio-devel/sbin/kamailio[24665]: INFO: tm [t_hooks.c:269]: run_trans_callbacks_internal(): restore backup AVPs Aug 9 09:56:14 kam01 /usr/local/kamailio-devel/sbin/kamailio[24665]: INFO: <core> [core/xavp.c:1236]: xavu_set_list(): setting list 0x561157559088 Aug 9 09:56:14 kam01 /usr/local/kamailio-devel/sbin/kamailio[24664]: INFO: tm [t_fwd.c:1012]: add_uac_dns_fallback(): 1: T 0x7fc9a0421a30, XAVU list 0x7fc9a041ebb0 Aug 9 09:56:14 kam01 /usr/local/kamailio-devel/sbin/kamailio[24664]: INFO: tm [t_fwd.c:1047]: add_uac_dns_fallback(): 2: T 0x7fc9a0421a30, XAVU list 0x7fc9a041ebb0 (Print the transaction X/AVP list below) Aug 9 09:56:14 kam01 /usr/local/kamailio-devel/sbin/kamailio[24664]: INFO: <core> [core/xavp.c:689]: xavx_print_list_content(): +++++ start XAVU list: 0x7fc9a041ebb0 (0x7fc9a0421c68) (level=0) Aug 9 09:56:14 kam01 /usr/local/kamailio-devel/sbin/kamailio[24664]: INFO: <core> [core/xavp.c:693]: xavx_print_list_content(): *** (l:0 - 0x7fc9a041ebb0) XAVU name: _tps_ Aug 9 09:56:14 kam01 /usr/local/kamailio-devel/sbin/kamailio[24664]: INFO: <core> [core/xavp.c:694]: xavx_print_list_content(): XAVU id: 1420310448 Aug 9 09:56:14 kam01 /usr/local/kamailio-devel/sbin/kamailio[24664]: INFO: <core> [core/xavp.c:695]: xavx_print_list_content(): XAVU value type: 6 Aug 9 09:56:14 kam01 /usr/local/kamailio-devel/sbin/kamailio[24664]: INFO: <core> [core/xavp.c:717]: xavx_print_list_content(): XAVU value: <xavp:0x7fc9a0421428> Aug 9 09:56:14 kam01 /usr/local/kamailio-devel/sbin/kamailio[24664]: INFO: <core> [core/xavp.c:689]: xavx_print_list_content(): +++++ start XAVU list: 0x7fc9a0421428 (0x7fc9a041ebd0) (level=1) Aug 9 09:56:14 kam01 /usr/local/kamailio-devel/sbin/kamailio[24664]: INFO: <core> [core/xavp.c:693]: xavx_print_list_content(): *** (l:1 - 0x7fc9a0421428) XAVU name: b_contact Aug 9 09:56:14 kam01 /usr/local/kamailio-devel/sbin/kamailio[24664]: INFO: <core> [core/xavp.c:694]: xavx_print_list_content(): XAVU id: 3522184920 Aug 9 09:56:14 kam01 /usr/local/kamailio-devel/sbin/kamailio[24664]: INFO: <core> [core/xavp.c:695]: xavx_print_list_content(): XAVU value type: 2 Aug 9 09:56:14 kam01 /usr/local/kamailio-devel/sbin/kamailio[24664]: INFO: <core> [core/xavp.c:704]: xavx_print_list_content(): XAVU value (str): sbc_b Aug 9 09:56:14 kam01 /usr/local/kamailio-devel/sbin/kamailio[24664]: INFO: <core> [core/xavp.c:730]: xavx_print_list_content(): *** (l:1 - 0x7fc9a0421428) end Aug 9 09:56:14 kam01 /usr/local/kamailio-devel/sbin/kamailio[24664]: INFO: <core> [core/xavp.c:693]: xavx_print_list_content(): *** (l:1 - 0x7fc9a041eb00) XAVU name: a_contact Aug 9 09:56:14 kam01 /usr/local/kamailio-devel/sbin/kamailio[24664]: INFO: <core> [core/xavp.c:694]: xavx_print_list_content(): XAVU id: 3511692759 Aug 9 09:56:14 kam01 /usr/local/kamailio-devel/sbin/kamailio[24664]: INFO: <core> [core/xavp.c:695]: xavx_print_list_content(): XAVU value type: 2 Aug 9 09:56:14 kam01 /usr/local/kamailio-devel/sbin/kamailio[24664]: INFO: <core> [core/xavp.c:704]: xavx_print_list_content(): XAVU value (str): sbc_a Aug 9 09:56:14 kam01 /usr/local/kamailio-devel/sbin/kamailio[24664]: INFO: <core> [core/xavp.c:730]: xavx_print_list_content(): *** (l:1 - 0x7fc9a041eb00) end Aug 9 09:56:14 kam01 /usr/local/kamailio-devel/sbin/kamailio[24664]: INFO: <core> [core/xavp.c:733]: xavx_print_list_content(): ----- end XAVU list: 0x7fc9a0421428 (level=1) Aug 9 09:56:14 kam01 /usr/local/kamailio-devel/sbin/kamailio[24664]: INFO: <core> [core/xavp.c:730]: xavx_print_list_content(): *** (l:0 - 0x7fc9a041ebb0) end Aug 9 09:56:14 kam01 /usr/local/kamailio-devel/sbin/kamailio[24664]: INFO: <core> [core/xavp.c:733]: xavx_print_list_content(): ----- end XAVU list: 0x7fc9a041ebb0 (level=0) Aug 9 09:56:14 kam01 /usr/local/kamailio-devel/sbin/kamailio[24664]: INFO: <core> [core/xavp.c:1258]: xavu_get_internal(): name _tps_, list (nil), prv (nil) Aug 9 09:56:14 kam01 /usr/local/kamailio-devel/sbin/kamailio[24664]: INFO: <core> [core/xavp.c:1559]: xavu_get_child(): ravp (nil), xavu current list 0x561157559088 (Topos does not find any AVPs) Aug 9 09:56:14 kam01 /usr/local/kamailio-devel/sbin/kamailio[24664]: ERROR: topos [tps_storage.c:331]: tps_storage_fill_contact(): could not evaluate a_contact xavu Aug 9 09:56:14 kam01 /usr/local/kamailio-devel/sbin/kamailio[24664]: ERROR: topos [tps_storage.c:615]: tps_storage_record(): failed to store For completeness here a successful call after the fix, here the trace shows that the cleanup is called after every INVITE (only added one log to the cleanup): First INVITE: Aug 11 13:05:00 kam01 /usr/local/kamailio-devel/sbin/kamailio[30646]: INFO: {2 14468 INVITE Y0VBO45pTjq3fmfpSLGngyq2F6UMaR5f} <script>: incoming reply 407 - Proxy Authentication Required in reply_route Aug 11 13:05:00 kam01 /usr/local/kamailio-devel/sbin/kamailio[30646]: ERROR: {2 14468 INVITE Y0VBO45pTjq3fmfpSLGngyq2F6UMaR5f} <core> [core/receive.c:628]: receive_msg(): cleaning up Aug 11 13:05:00 kam01 /usr/local/kamailio-devel/sbin/kamailio[30661]: INFO: {1 14468 ACK Y0VBO45pTjq3fmfpSLGngyq2F6UMaR5f} <script>: got request ACK to sip:customer-2@sip01.tst.nbg.domain.net from 116.203.XX.XX:5095 Aug 11 13:05:00 kam01 /usr/local/kamailio-devel/sbin/kamailio[30661]: INFO: {1 14468 ACK Y0VBO45pTjq3fmfpSLGngyq2F6UMaR5f} <script>: set XAVPs Aug 11 13:05:00 kam01 /usr/local/kamailio-devel/sbin/kamailio[30661]: ERROR: {1 14468 ACK Y0VBO45pTjq3fmfpSLGngyq2F6UMaR5f} <core> [core/receive.c:628]: receive_msg(): cleaning up Aug 11 13:05:00 kam01 /usr/local/kamailio-devel/sbin/kamailio[30661]: INFO: {1 14469 INVITE Y0VBO45pTjq3fmfpSLGngyq2F6UMaR5f} <script>: got request INVITE to sip:customer-2@sip01.tst.nbg.domain.net from 116.203.XX.XX:5095 Aug 11 13:05:00 kam01 /usr/local/kamailio-devel/sbin/kamailio[30661]: INFO: {1 14469 INVITE Y0VBO45pTjq3fmfpSLGngyq2F6UMaR5f} <script>: set XAVPs Aug 11 13:05:00 kam01 /usr/local/kamailio-devel/sbin/kamailio[30661]: ERROR: {1 14469 INVITE Y0VBO45pTjq3fmfpSLGngyq2F6UMaR5f} <core> [core/receive.c:628]: receive_msg(): cleaning up DNS Failover: Aug 11 13:05:05 kam01 /usr/local/kamailio-devel/sbin/kamailio[30643]: INFO: {2 14469 INVITE Y0VBO45pTjq3fmfpSLGngyq2F6UMaR5f} <script>: incoming reply 100 - trying -- your call is important to us in reply_route Aug 11 13:05:05 kam01 /usr/local/kamailio-devel/sbin/kamailio[30643]: ERROR: {2 14469 INVITE Y0VBO45pTjq3fmfpSLGngyq2F6UMaR5f} <core> [core/receive.c:628]: receive_msg(): cleaning up Aug 11 13:05:05 kam01 /usr/local/kamailio-devel/sbin/kamailio[30642]: INFO: {1 14469 INVITE Y0VBO45pTjq3fmfpSLGngyq2F6UMaR5f} <script>: got request INVITE to sip:customer-2@116.203.XX.XX:5066;ob from 116.203.YY.YY:5060 Aug 11 13:05:05 kam01 /usr/local/kamailio-devel/sbin/kamailio[30642]: INFO: {1 14469 INVITE Y0VBO45pTjq3fmfpSLGngyq2F6UMaR5f} <script>: set XAVPs Aug 11 13:05:05 kam01 /usr/local/kamailio-devel/sbin/kamailio[30642]: ERROR: {1 14469 INVITE Y0VBO45pTjq3fmfpSLGngyq2F6UMaR5f} <script>: routing out Aug 11 13:05:05 kam01 /usr/local/kamailio-devel/sbin/kamailio[30642]: INFO: {1 14469 INVITE Y0VBO45pTjq3fmfpSLGngyq2F6UMaR5f} <script>: relayed INVITE to sip:customer-2@116.203.XX.XX:5066;ob over <null> with udp:116.203.YY.YY:5060 Aug 11 13:05:05 kam01 /usr/local/kamailio-devel/sbin/kamailio[30642]: ERROR: {1 14469 INVITE Y0VBO45pTjq3fmfpSLGngyq2F6UMaR5f} <core> [core/receive.c:628]: receive_msg(): cleaning up Aug 11 13:05:05 kam01 /usr/local/kamailio-devel/sbin/kamailio[30657]: INFO: {2 14469 INVITE Y0VBO45pTjq3fmfpSLGngyq2F6UMaR5f} <script>: incoming reply 100 - Trying in reply_route Aug 11 13:05:05 kam01 /usr/local/kamailio-devel/sbin/kamailio[30657]: ERROR: {2 14469 INVITE Y0VBO45pTjq3fmfpSLGngyq2F6UMaR5f} <core> [core/receive.c:628]: receive_msg(): cleaning up Aug 11 13:05:07 kam01 /usr/local/kamailio-devel/sbin/kamailio[30658]: INFO: {2 14469 INVITE Y0VBO45pTjq3fmfpSLGngyq2F6UMaR5f} <script>: incoming reply 603 - Decline in reply_route Aug 11 13:05:07 kam01 /usr/local/kamailio-devel/sbin/kamailio[30658]: ERROR: {2 14469 INVITE Y0VBO45pTjq3fmfpSLGngyq2F6UMaR5f} <core> [core/receive.c:628]: receive_msg(): cleaning up Aug 11 13:05:07 kam01 /usr/local/kamailio-devel/sbin/kamailio[30640]: INFO: {1 14469 ACK Y0VBO45pTjq3fmfpSLGngyq2F6UMaR5f} <script>: got request ACK to sip:customer-2@116.203.XX.XX:5066;ob from 116.203.YY.YY:5060 Aug 11 13:05:07 kam01 /usr/local/kamailio-devel/sbin/kamailio[30640]: INFO: {1 14469 ACK Y0VBO45pTjq3fmfpSLGngyq2F6UMaR5f} <script>: set XAVPs Aug 11 13:05:07 kam01 /usr/local/kamailio-devel/sbin/kamailio[30640]: INFO: {1 14469 ACK Y0VBO45pTjq3fmfpSLGngyq2F6UMaR5f} <script>: relayed ACK to sip:customer-2@116.203.XX.XX:5066;ob over <null> with udp:116.203.YY.YY:5060 Aug 11 13:05:07 kam01 /usr/local/kamailio-devel/sbin/kamailio[30640]: ERROR: {1 14469 ACK Y0VBO45pTjq3fmfpSLGngyq2F6UMaR5f} <core> [core/receive.c:628]: receive_msg(): cleaning up Aug 11 13:05:07 kam01 /usr/local/kamailio-devel/sbin/kamailio[30641]: INFO: {2 14469 INVITE Y0VBO45pTjq3fmfpSLGngyq2F6UMaR5f} <script>: incoming reply 603 - Decline in reply_route Aug 11 13:05:07 kam01 /usr/local/kamailio-devel/sbin/kamailio[30641]: ERROR: {2 14469 INVITE Y0VBO45pTjq3fmfpSLGngyq2F6UMaR5f} <core> [core/receive.c:628]: receive_msg(): cleaning up Aug 11 13:05:07 kam01 /usr/local/kamailio-devel/sbin/kamailio[30659]: INFO: {1 14469 ACK Y0VBO45pTjq3fmfpSLGngyq2F6UMaR5f} <script>: got request ACK to sip:customer-2@sip01.tst.nbg.domain.net from 116.203.XX.XX:5095 Aug 11 13:05:07 kam01 /usr/local/kamailio-devel/sbin/kamailio[30659]: INFO: {1 14469 ACK Y0VBO45pTjq3fmfpSLGngyq2F6UMaR5f} <script>: set XAVPs Aug 11 13:05:07 kam01 /usr/local/kamailio-devel/sbin/kamailio[30659]: ERROR: {1 14469 ACK Y0VBO45pTjq3fmfpSLGngyq2F6UMaR5f} <core> [core/receive.c:628]: receive_msg(): cleaning up Cheers, Henning -- Henning Westerholt – https://skalatan.de/blog/ Kamailio services – https://gilawa.com -----Original Message----- From: Daniel-Constantin Mierla &lt;miconda(a)gmail.com&gt; Sent: Thursday, August 11, 2022 10:47 AM To: Kamailio (SER) - Development Mailing List &lt;sr-dev(a)lists.kamailio.org&gt;rg>; Henning Westerholt &lt;hw(a)gilawa.com&gt; Subject: Re: [sr-dev] git:master:d6b1c20d: tm: restore X/AVP values from initial transaction in DNS failover processing Hello, I haven't looked in the code to try to figure out the execution paths to this function and where ends up afterwards, so more for safety: have you checked that there are no other X/AVPs set at that moment, or if they are they are restored later? Usually when setting x/avps lists, the old ones have to be restored in order to be sure it does not end up in memory leaks (or the old ones have to be cleaned up). Cheers, Daniel On 09.08.22 16:16, Henning Westerholt wrote: -- Daniel-Constantin Mierla -- www.asipto.com www.twitter.com/miconda -- www.linkedin.com/in/miconda